Research on the Features of Chlorophyll-a Derived from RapidEye and EOS/MODIS Data in Chaohu Lake

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Wen, X.^1 ; Zhou, Z.^2 ; Chen, B.^1 ; Li, Z.^1 ; Tang, X.^3

Changjiang River Water Resource Commission Changjiang River Scientific Research Institute, Wuhan, China^1

Changjiang River Water Resource Commission Yangtze River Water Resources Protection Bureau, Water Environment Monitoring Center of Yangtze Valley, Wuhan, China^2

Department of Computer, Wuhan Ordnance N. C. O. Academy of PLA, Wuhan, China^3

关键词: Band combinations;    Correlation coefficient;    Fresh water lakes;    High spatial resolution;    Inversion models;    Near-infrared channels;    Temporal resolution;    Water environments;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012111/pdf
DOI  :  10.1088/1755-1315/17/1/012111

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Chaohu Lake is one of the largest freshwater lakes in China, however, with the rapid expansion of Hefei, the water environment of Chaohu Lake shows significantly deterioration. In this paper, RapidEye and MODIS imagery were used to monitor the chlorophyll alpha (Chla) distribution in Chaohu Lake. After analyzing the correlation between in-situ measured Chla concentrations and each channel of RapidEye and MODIS imagery, the optimal band combination for the establishment of Chla concentration was determined. For RapidEye imagery, the red edge channel and near infrared channel are relatively more sensitive than other channels. The inversion model using the feature of (B5+B4)/(B2+B1) worked the best with the square value of correlation coefficient reaching up to 0.745. A similar procedure was applied to MODIS imagery. The experiments show that RapidEye with its red edge channel is an effective data source for water environment monitoring, it could provide high spatial resolution of Chla distribution thematic map, MODIS with its higher temporal resolution is also an effective data source in dynamically monitoring water environment. The Chla concentration in the western half of Chao Lake is higher than that in the eastern half.